futuresimple/android-floating-action-button — pull request #68 by GlitchTech (2014-12-19 15:36:00+00:00)
Title: Added optional event callback when menu is toggled

I had need to add a scrim to the display when the Menu was open, hence OnFloatingActionMenuUpdateListener. If this is set, it will fire when toggle() is called. See issue #51 for my original submission which is an extended class to handle this.